With a tgirl id definitely want to switch roles, why miss out on a good half of the fun? but i think i would want to be passive a good deal of the time and put her lovely shecock to good use.
Though from what i understand and can imagine i suspect most that most tgirls would want the guy to be in charge and treat her like a real girl after all that is the ultimate goal for most of them.
Mmmm its very confusing and complex the world of the shemale.
